Which of the following gases occupy the largest volume at STP?

Question

Quizplus · Accepted Answer

At standard temperature and pressure (STP), one mole of any gas occupies 22.4 liters. The volume a gas occupies is directly related to the number of moles of the gas, not its molecular weight. A) 12.00 g of He equals 3 moles (since the molar mass of He is approximately 4 g/mol), which would occupy 67.2 liters (3 moles × 22.4 liters/mole). B) 2 moles of water vapor would occupy 44.8 liters. C) 38.00 g of F₂ equals 1 mole (since the molar mass of F₂ is approximately 38 g/mol), which would occupy 22.4 liters. D) 6.022 × 10^23 molecules of ammonia is exactly 1 mole, which would occupy 22.4 liters. Therefore, 12.00 g of He (option A) occupies the largest volume at STP.

Which of the Following Gases Occupy the Largest Volume at STP